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Altera_Forum's avatar
Altera_Forum
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17 years ago

Which FFT core to use...need some advice.

I am implementing a 2D transform on images (256x256 for now). The image lines are fed thru the fft and the results stored in external memory that the fpga uses for frame buffering. Then the results...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

I don't think I need to stall the core mid-packet in my app. I can guarantee that the video frame can be streamed in uninterrupted. The video line length is the length of the fft. I just needed to stall the core between frames. This way, when I feed in a new frame, the source_valid signifies where my new output starts. Otherwise, I could just leave the core running and control when I start a new frame going in. The problem there would be the source_valid would be true all the time.

Since I'm pulling pixels out of memory into a fifo to feed this thing, I already have counters going to know where line and frame boundaries are so I can just use those.

Thanks for your thoughts.